Strand winding device



Nov; 10, 1942. J. H. GARROTT 2,301,693

STRAND WINDING DEVICE Filed Oct. 25, 1941 4.Sheets-Sheet l Z6 27 I INVENTOR.

NqvQ 10, 1942. J, H. GARRO-TT I 2,301,693

STRAND WINDING DEVICE Filed. Oct. 23, 1941 4 Sheets-Sheet 2 IN VENTOR.

Nov. 10, 1942. GARROT 'T 2,301,693 7 STRAND WINDING DEVICE Filed Oct. 23, 1941 4 Sheets-Sheet 3 NVENTOR.

W w W w 1 m @7 3/ 6 WM. 4 40/4 u Patented Nov. 10, 1942 STRAND WINDING navrcs" John H. Garrott, Bloomfield, N. 1., assignor to The Clark Thread Company, Newark, N. J., a corporation of New Jersey Application October 23, 1941, Serial No. 416,193

6 Claims.

This invention is an improvement in the art of strand winding on bobbins.

It is desirable that the strand mass at the end of the bobbin opposite the. base be such as to facilitate the withdrawal of the thread from the bobbin in use and various mechanisms have been described in patents to produce bobbins wherein I the mass of thread has a tapered end.

It is an object of the present invention to pro-' vide improved mechanism to produce a tapered end. It is a further object to provide mechanism by means of which the contour of the generally tapered end can be varied conveniently and efficiently.

The invention is capable of application to conventional strand winding machines. In such machines the bobbin may be rotatably mounted on.

an arbor driven by suitable driving mechanism.

A thread guide is mounted upon suitable traverse mechanism in such a way that the thread guide reciprocates through a. predetermined path axially of the bobbin and also moves radially thereof, the thread guide bearing against the surface of the strand mass and being radially moved by the building up of said mass radially of the bobbin. Such conventionalmechanism is well known and need not be described except to the extent necessary to show the manner in which the present invention cooperates therewith.

In accordance with the invention, pivoted means, as, for example, a, lever, is mounted to swing horizontally. There is a connection between one end of the lever and a bobbinmrain sleeve mounted on the arbor adapted to convert swinging movement of the lever into move-- ment of the bobbin. There is also provided means, preferably of a resilient nature, connected to the lever tending to urge it to swing horizontally and therefore to impart an axial arbor in suitable spaced relation to the bobbincarrying arbor and having an axis parallel thereto, and this cam-carrying arbor as well as the lever pivoted to swing horizontally may be carried by a single bracket secured to the framework of the winding machine. This rotatably mounted cam is provided with an eccentric surface which engages the lever, as for example by means of the cam follower on the lever, and opposes the swinging movement of said lever. By rotating eccentricity of the cam surface and axial movement is thereby imparted to the bobbin in accordance with the character of that eccentric surface. As a result, the contour of the strand mass on the bobbin at the end thereof opposite the base will be of thesame character as the contour of the cam. That contour may be varied through quite a wide range. If the contour of the cam is projected on a horizontal plane from the cam in its operative position, that projection may be a straight line inclined in relation to the axis of the bobbin, or a curved line concave or convex in relation to the axis of the bobbin, or it may have any desired configuration, irregular or otherwise. One of the desired configurations is that of a series of steps so that the end of the bobbin may be given a so-called "stepped wind." The ro-- tation of the cam is effected by the swinging radial movement of the traverse mechanism. For example, the rotatably mounted cam may be. driven by' a gear engaging a rack pivotally mounted on the traverse mechanism or by any other suitable means. I

The invention will be defined in the claims and will be further described and illustrated in respect 01' a specific embodiment of the principles thereof in the following description and illustrated by the drawings, in which:

Fig. 1 shows an end view of a conventional winding machine equipped with the improvement of the present invention;

Fig. 2 is a top plan. view of the same, showing the position of the parts at the beginning of the winding operation;

Fig. 3 is a horizontal plan view, partly in section, on the line li b of Fig. 1 showing the rela tion of certain parts after completion of the winding operation wherein a. stepped wind is shown as imparted to the strand mass on the bobbin by way of illustration;

Fig. 4 is a side elevational view, partly in sec tion;

Fig. 5 is a fragmentary view, partly in section, showing the rotatably mounted cam and its eccentric surface, which in this case has a coin figuration adapted to produce a stepped wind;

Fig. 6 is a view'taken on the line ti -t of Fig. 5 to further illustrate the cam and the engagement of the eccentric surface thereof with the cam follower on the lever mounted for horizontal swinging movement;

Fig. 7 is a further view looking in the direction of the arrows at the left of Figs. 1 and 2 and in the same direction as the view shown in Fig. 5

this cam, the lever is permitted to follow the tofurther illustrate the mounting of the rotatably mounted cam and its immediately associated mechanism and also illustrating the single bracket which may be employed to support the cam and lever;

Fig. 10a shows a scalloped wind produced by,

a cam 6i having the contour 61A shown in Fig. 10; I

Fig. 11 shows a species of eccentric contour on the cam which is convex in relation to the axis of the bobbin and is adapted to produce a convex contour of the strand mass at the end thereof,

as illustrated in Fig. 1 1a;

Fig. 11a shows a convex tapered wind produced by a cam 62 having the contour 62A shown in Fig. 11;

Fig. 12 shows a straight line taper characterizing the cam surface adapted to produce a straight line taper on the strand mass, as illustrated in Fig. 12a.

Fig. 12a shows a straight-line tapered wind produced by a cam 63 having the contour 63A shown in Fig. 12.

Figs. 10, 11, and 12 are projections on a horis zontal plane of the contour of the eccentric cam surface, these projections being taken from the cam in its operative position onto said horizontal lane. p Referring to the drawings more in detail, in whiclrlike parts are represented by the same numerals, a bobbin is mounted on an arbor-2 driven through clutch mechanism 3 by a drive shaft 4 driven in a conventional manner by mechanism not shown. For the sake of convenience, the mechanism which presents the thread to the bobbin and the strand mass will be referred to generally-as traverse mechanism 5 which it is not necessary to show or describe in detail because, except for the modification of the structure thereof for cooperation with th structure of the present invention, such traverse mechanism is well known. The traverse framework 6 carrying the traverse mechanism 5. is pivoted to move radially in relation to the axis of the arbor I by means of the shaft 1 journaled in bearings 8 in framework 6A in the machine, the conventional counterweight being provided for this purpose. The traverse mechanism includes the tra- Verse bar 10 connected to the shoe II which is given a reciprocating motion on the rail l2 by a grooved eccentric wheel l4 mounted on the shaft 1. The traverse bar I 0 carries the member it on which the thread guide I8 is mounted and through which the thread is passed and presented to the stand mass 26 for winding. after passing over the thread guide roller 22.

A bracket 23 is adjustably secured to the bars 24, 24A of the framework of the machine by means of clamps 25 and bolts 26 secured by nuts 21. An extension of this bracket 23 is provided with a bearing or pivot 23 in which is journaled the vertical arm 29 of an elbow member 36 connected at one end to the bar 24 by the spring 32. On this arm 29 is secured, by means of a set screw 34, a lever 36 mounted to swing horizontally and provided at one end thereof with a member 38 which rides in a groove definedv by the flanges 40 of a sleeve 4| slidably mounted on arbor 2. Since the bobbin l is mounted to slide axially on the arbor 2, the lever 36 acting under the bias of the spring 32 tends to move the bobbin l axially along said arbor 2 and to thereby move the bobbin I. The lever 36 carries a cam follower or its equivalent which may take the form of a pin adjustably mounted on the lever in the slot 41 by means of a nut v49 engaging the threaded end 50 of said pin so that the said pin or cam follower 45 may be adjusted longitudinally of the lever 36.

An extension of the bracket 23 carries a slotted member 52 in which the arbor 54 having a threaded end 55 is adjustably secured by means of a nut 56 so that the arbor 54 can be horizontally adjusted in relation to the cam follower 45 for a reason to be presently explained. On- I this arbor 64, there is rotatably mounted a cam element 60 illustrated in detail in Figs. 5 and 6. This cam element 66 has an eccentric surface 6!, the character of which is subject to considerable variation. In the specific form shown in Figs. 5 and 6, the contour of this eccentric surface has a stepped character and, if this contour is projected from the cam in its operative position onto a horizontal plane (see for example Figs. 2 and 3), the result is an irregularline of a stepped character. The eccentric ,surface SI of the cam 66 bears against the cam follower 45 and thus opposes the tendency of the horizontal lever 36 to swing in its horizontal plane and therefore also opposes the tendency of said lever 36 to givethe sleeve ii and bobbin 8 an axial thrust. Suitable rotation of this cam 60 permits the cam follower 45 and. lever 36 to follow the eccentricity of the cam surface and thus to cause the lever 36 to move the bobbin i axially in accordance with the character of the cam surface. If the projection of the cam contour on a horizontal plane is a duced by choosing appropriate cam surfaces, as-

illustrated in Figs. 10 and 11.

Fig. 10 illustrates an eccentric cam surface 6IA of a scalloped character and Fig. 11 an eccentric cam surface 62A convex in relation to the axis of the arbor 2. Fig. 10a illustrates the sealloped wind obtained from an eccentric cam surface of the character shown in Fig. 10, and Fig. 7, 11a shows a convex wind obtained-from a cam surface of the character shown in Fig. 11. Fig. 12 shows a straight-line cam surface. contour 63A adapted to produce the straight-line wind illustrated in Fig, 12a. Figs. 5 and 6 show in detail the type of cam surface adapted to produce a stepped wind of the character shown in Fig. 3 and as already explained.

Rotation of the cam is efiected, as shown, in consonance with'the axial movement of the traverse mechanism 5. For this purpose, a gear 64 is secured to the cam 60 and rotatably mounted on the arbor by means of the hub 66 secured to the cam 60 and one or more keys or dowel pins 68. The gear 64 is engaged by a rack 16 pivotally I secured to the traverse frame 6 by means of the pin 12. A roller 14 bearsagainst the top of the rack 70, the roller 14 being rotatably mounted as'oaoos on a pin 15 carried by the bracket 16. This bracket is split at one end and secured to the arbor by means of the screw 18. The upper end ment of said pivoted means; and means actuated v varied through a wide range and, as already' stated, the particular character of the contour of the eccentric surface may also be varied.

In orderto permit the cam follower to properly engage with and follow the eccentrlcity'of the. cam surface, it is desirable to be able to adjust the cam carrying arbor 54 and the cam follower 45 in relation to each other and for this purpose provision is made so that this relative adjustment may readily be obtained. It is for this purpose that a slot 84 in the bracket 23 is provided so that the cam-carrying arbor can be given a laterally adjusted position. For the same purpose the slot 4'! is provided in the lever to permit complementary or corresponding lateral adjustment of the cam follower. Furthermore, with any given cam the latter may be angularly adjusted on the arbor by providing a series of xeyways inthe hub to receive dowel pins securing the hub to the gear.

The bracket 23 carrying the lever and cam may desirably be formed of a single casting.

In operation, the bobbin I is rotated and thread is fed thereto through the guide i8 which is given a reciprocating movement in a predetermined and fixed. path parallel to the axis of the bobbin by the traverse mechanism 5. As the strand mass 20 builds up on the bobbin the traverse mechanism 5 and frame 6 is given a radial movement in relation to the axis of the bobbin and the frame 6 swings in a plane perpendicular to the axis of the bobbin. The raclr it pivoted to the frame 6 and engaging the gear it causes rotation of the cam fill. The lever tends-to urge the bobbin I axially along the arbor 2, this tendency being opposed by engagement of the eccentric cam surface with the cam follower t5 iii permits the lever to follow the eccenthe cam surface and axial movement is imparted to the bobbin in accordance will bile character or cont-our of the eccentricity of ti surface. Since the throw or path which the thread guide reciprocates no axial movement of the bobbin, the character or contour of the strand mass at the end of the bobbin opposite the base thereof is of'the same character as the contour of the cam, by virtue of the character of the cam, its rotation in the stated manner and its cooperation with the means tending to urge the bobbin axially along the arbor on which the bobbin is mounted.

I claim:

1. In a machine, for winding a strand mass on a bobbin, of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a horizontal revolvably mounted arbor; pivoted means mounted to swine horizontally and provided with means tending to urge said bobbin axially along said arbor; a cam mounted to rotate about an, axis parallel to the axis of the bobbin, said cam having an eccentric periphery which, in projection, from its operative position, on.a horizontal plane, has a contour of substantially the same character as the contour of the taper of the end of the strand mass to be wound on said bobbin; a cam follower on pivoted means; said eccentric cam periphery engaging said cam follower and opposing swinging moveby the radial movement of said traverse mechanism to rotate said cam and thereby permit said pivoted means to follow said eccentric periphery and'to impart axial movement to the bobbin in ,accordance with the character of said eccentric periphery.

2. In a, machine, for winding a strand mass on a bobbin, of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a revolvably mounted arbor; a lever pivoted intermediate the ends thereof to swing horizontally; means at one end of the lever adapted to convert swinging movement of the lever into axial movement of the bobbin; resilient means connected to the other end of the lever normally urging the lever to swing and thereby cause axial movement of the bobbin; a cam mounted to rotate about an axis parallel to the axis of the bobbin, said cam havtraverse mechanism to rotate said cam and there-- by permit said lever to follow said eccentric periphery and to impart axial movement to the bobbin in accordance with the character of said eccentric periphery.

3. in machine, for winding a strand mass on a bobbin, of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a revolvably mounted arbor; pivoted means mounted to swing horizontally and provided with means tending to urge said. bobbin axially along said arbor; a cam mounted to rotate about an axis parallel to the axis oi e mandrel, said cam having an ecceniery which, in projection, from. its operon, on a horizontal plane, has a conubstantially the same character as the contour of the taper oi the end of the strand mass to be wound on said bobbin; a cam follower on said pivoted means; said eccentric cam peri hery engaging said cam follower and opposing swinging movement ofsaid pivoted means; a gear adapted to rotate said cam; and a rack engaging said gear and actuated by the radial movement of said traverse mechanism to rotate said gear and cam and thereby permit said lever to impart axial movement to the bobbin in accordance with the character of the eccentric periphery of said cam.

4. In a machine, for winding a strand mass on a bobbin, of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a revolvably mountedarbor; a bracket secured to the framework of said winding machine;- a lever pivoted on said bobbin; a cam rotatably mounted on said arbor;

a cam follower on said lever; said cam havin an eccentric surface engaging said cam follower and opposing swinging movement of said lever; means on said bracket and lever to permit relative adjustment of said cam follower in relation to said cam surface; and means actuated by the radial movement of said traverse mechanism to rotate said cam and thereby permit said lever to follow said eccentric cam surface and to impart axial movement to the bobbin in accordance with the character of said eccentric periphery.

5. In a machine, for winding a strand mass on a bobbin, of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a revolvably mounted arbor; a lever mounted to-sw'ing horizontally and provided with means tending to urge said mandrel and bobbin axially along said shaft; a cam follower mounted on said pivoted means; a cam mounted to rotate about an axis parallel to the axis of the bobbin, said cam having an eccentric surface engaging said cam iollower said eccentric periphery.

and opposing the swinging movement of said lever; and means actuated by the radial movement of said traverse mechanism to rotate said cam'and thereby to permit said cam i'ollower and lever to follow the eccentricity of said cam surface and. thereby to impart axial movement to the bobbin in accordance with the character of said eccentric cam surface.

6. In a machine for winding a strand mass on a bobbin. of the type wherein traverse mechanism carrying a thread guide moves axially and radially in relation to a bobbin mounted to rotate with and move axially along a horizontal revolvably mounted arbor; bobbin-urging means tending to urge said bobbin axially along said arbor; a cam mounted to rotate about an axis parallel to the axis of the bobbin, said cam having an eccentric periphery which, in projection, from its operative position, on a horizontal plane, has a contour of substantially the same character as the contour of the taper of the i end of the strand mass to be wound on said bobbin; said eccentric cam periphery engaging said bobbin-urging means and opposing said axial movement of the bobbin; and means actuated by the radial movement of said traverse meshanism to rotate said cam and thereby permit said bobbin-urgingmeans to follow said eccentric periphery and to impart axial movement to the bobbin in accordance with the character of JOHN H. GARROTI. 

